Struve 2974

 
Richard Harshaw 
Star: Struve 2974
Date & Time: September 5, 2001,
0230 to 0510 UT
Seeing: 6 <1-10 Seeing Scale (10 best)>
Transparncy: 6 to 7 (variable, due to high hazy clouds) <1-10 Seeing Scale (10 best)>
Location of site: Northern Kansas City,
Missouri (USA). 39º15' N, 94º30'W
980 ft above Mean Sea Level
Site classification: suburban 
Sky darkness: -- <Limiting magnitude>
Telescope: Celestron C-8, C-11
Magnification: 112x, 311x
Harshaw Scale: 4 <1-5; 1 best>
HD Number 218097
ADS 16496
Position:  2305+3323  Rating:  4
Components:
 A:  7.5m, A0
 B:  8.1m, 3” @ 164 + 
Year of last AB Measure:  1970
Distance (l.y.): 650, Luminosity (Suns): 50
Observed colors:  W, W 

Observations: Observed at 311x.  Both W, easily split.  A split was obtained at 112x.

Notes: First measure 2.8" @ 160.
 


 
Jim Jones
Star: Struve 2974
Date & Time: 09/07/01   0515 UTC
Seeing: 5 <1-10 Seeing Scale (10 best)>
Location of site: Lake Oswego, Oregon
Site classification: Suburban
Sky darkness: 4.0 LM
Sky:  Full moon + 5 days.
Telescope: 8" LX50
Eye Pieces:  18 mm Radian, 2x Ultima
Magnification: 112x, 224x
Est PA without inst....180d

Equal magnitude, close double with a N-S alignment. Peanut at 112x with occasional black  space visible.  Clear but messy split at 224x .
 
 
 
 

 


 
John M. Ryan
Star: Struve 2974 
Date & Time: 12 Sept 2001 ( 22:00 UT)
Seeing: 6+ <1-10 Seeing Scale (10 best)>
Location of site: Barreras, Salamanca, Spain.
Site classification: Rural,Suburban.
Conditions: fairly dry but with gusts of wind.
Sky darkness: 5+ <Limiting magnitude>
Telescope: Meade 8" SCT mounted on a Losmandy GM8.
Eyepieces: 12mm plossl, 10mm plossl
Magnification: 167X, 200X
Harschaw's Escale: 2 <1: Excellent, 5: Poor>
Nice tight double, just split it at 167X and much better at 200X Both have a tint of blue. This double is another of equal magnitudes. I liked this also and gave it a rating of 2.
 
 
 
 
 
 
 

 


 
Jim Phillips
Star: Struve 2974
Date & Time: Oct. 8, 2001
Seeing: 6-7 <1-10 Seeing Scale (10 best)>
Transparency: 6 <1-10 Seeing Scale (10 best)>
Location of site: Hodges, South Carolina, USA
Site classification: Suburban
Sky darkness:  <Limiting magnitude>
Temperature: 45ºF
Telescope: Astrphysics 155 F/7 Apo
Magnification: 181x
Nice Vertcal pair! White with a bluish hue.
 
 
 
 
 

 

 
 
Stuart Clough
Star: Struve 2974
Date & Time: 24.10.01 2020 UT
Seeing: 6 <1-10 Seeing Scale (10 best)>
Location of site: Near Halifax
West Yorkshire, England.
Site classification: Suburban
Temperature: 8ºC
Sky darkness: 3.8 (U Mi) <Limiting magnitude>
Conditions: Variable cloud, Wind SW 8 kts
Telescope: Orion Optics UK GX250
10"  f4.8 Newtonian on Vixen GP mount.
Eyepieces: 20mm Plossl, 9 mm Ortho, Ultima x2 Barlow 
Magnification: x60, x133, x267
             
A bit more difficult than expected, this double was easily located but showed only elongation at x60 - perhaps a time of poorer seeing. It was nicely split at x133, 
although the best view was undoubtedly at x267. The components are two very evenly 
matched stars. I saw both of them as white.
   
The bright moon and high haze combined with suburban light pollution to wash out the sky considerably